shots were for grouping not bullseye, at 50 yard, did a few shots, same result, there all over, I think I know the problem, was this die made based on a certain riffle? I noticed it is small for my texan, I will use my calipers to measure diameter

Ok so I received 20ft lead wire from rotometals, And I have made close to 40 slugs, I been cutting the wire at a length that’s averaging 65.5, some at 67, 64, but most of them at 65.5 grain, I separated the 65.5, these are the RN and Inspected every single one of them for deformities, and so far they all look good, will be testing for groups soon